Science 6 · Unit 6: Light and the Solar System · Cambridge Primary Science Stage 6

Questions

1. 1. What is refraction?

   • the bouncing of light
   • the blocking of light
   • the making of light
   • the bending of light
   Check

2. 2. Why does refraction happen?

   • Light changes colour.
   • Light travels at different speeds in different mediums.
   • Light stops in water.
   • Mirrors bend it.
   Check

3. 3. What is a medium?

   • a medium-sized lens
   • a kind of mirror
   • a light source
   • a material light travels through, such as water, glass or air
   Check

4. 4. Why does a pencil in a glass of water look bent?

   • The glass is a mirror.
   • Light from it refracts as it passes from water to air.
   • The pencil is soft.
   • The water bends the pencil.
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5. 5. What is an optical illusion?

   • something our eyes see that is not real
   • a type of lens
   • a real image
   • a light source
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6. 6. Sofia sees a fish in a pond. Is it exactly where it seems to be?

   • No, refraction makes it appear in a different place.
   • Yes, water doesn't affect light.
   • Yes, always.
   • No, because of reflection.
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7. 7. What is a lens?

   • a light bulb
   • an opaque block
   • a flat mirror
   • a transparent material with at least one curved surface
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8. 8. What does a convex lens do?

   • blocks light
   • reflects light back
   • makes things look smaller always
   • makes things look bigger
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9. 9. What is the focal point of a convex lens?

   • where light starts
   • the centre of a mirror
   • the edge of the lens
   • where the light rays meet after passing through it
   Check

10. 10. Which of these uses convex lenses?

    • a light bulb
    • a plane mirror
    • a periscope's mirrors
    • binoculars
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11. 11. A drop of water on plastic wrap over print makes the words bigger. Why?

    • The words grew.
    • The curved drop acts like a convex lens.
    • Water is a mirror.
    • Water is opaque.
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12. 12. What is a prism?

    • a light source
    • a flat mirror
    • a round lens
    • a triangular block of glass or clear plastic
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13. 13. What happens when white light passes through a prism?

    • It splits into different colours.
    • It stops.
    • It turns black.
    • It becomes brighter white.
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14. 14. How many colours make up white light?

    • 5
    • 7
    • 3
    • 10
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15. 15. What do you need to see a rainbow?

    • a cloudy sky with no sun
    • only rain at night
    • only sun with no rain
    • sun behind you and rain in front of you
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16. 16. What acts like tiny prisms to make a rainbow?

    • raindrops
    • snowflakes only
    • clouds
    • mirrors
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17. 17. Who first discovered that white light is made of different colours?

    • Galileo
    • Archimedes
    • Isaac Newton
    • Alessandro Volta
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18. 18. What is a mirage?

    • a kind of lens
    • a mirror image
    • a real lake in the desert
    • an optical illusion of water caused by refraction
    Check